✏️ Editing: util.cpython-39.opt-1.pyc Read Only

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* (Linux) `/a/b/c` returns `['/a/b/c', '/a/b', '/a', '/']`
      * (Windows) `C:\a\b\c` returns `['C:\a\b\c', 'C:\a\b', 'C:\a', 'C:']`

:param str path: the path to break into prefixes

:returns: all possible path prefixes of given path in descending order
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Mitigates https://github.com/certbot/certbot/issues/1833

:param str cmd: the command that is being searched for in the PATH

:returns: True if the operation succeeded, False otherwise
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